<template>
    <div class="type-nav">
        <div class="container">
            <div class="nav-left" @mouseleave="leaveHidden">
                <h2 class="all" @mouseenter="flag = true">全部商品分类</h2>
                <div class="sort" v-show="flag">
                    <div class="all-sort-list2" @click="BtnSearch">
                        <div class="item" v-for="c1 in categoryList.slice(0, -2)" :key="c1.categoryId">
                            <h3>
                                <a data-level="1" :data-name="c1.categoryName" :data-id="c1.categoryId"
                                    href="javascript:;">{{
                                            c1.categoryName
                                    }}</a>
                            </h3>
                            <div class="item-list clearfix">
                                <div class="subitem">
                                    <dl class="fore" v-for="c2 in c1.categoryChild" :key="c2.categoryId">
                                        <dt>
                                            <a href="javascript:;" data-level="2" :data-name="c2.categoryName"
                                                :data-id="c2.categoryId">{{ c2.categoryName }}</a>
                                        </dt>
                                        <dd>
                                            <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                                                <a href="javascript:;" data-level="3" :data-name="c3.categoryName"
                                                    :data-id="c3.categoryId">{{ c3.categoryName }}</a>
                                            </em>

                                        </dd>
                                    </dl>
                                </div>
                            </div>
                        </div>

                    </div>
                </div>
            </div>
            <nav class="nav">
                <a href="###">服装城</a>
                <a href="###">美妆馆</a>
                <a href="###">尚品汇超市</a>
                <a href="###">全球购</a>
                <a href="###">闪购</a>
                <a href="###">团购</a>
                <a href="###">有趣</a>
                <a href="###">秒杀</a>
            </nav>
        </div>
    </div>
</template>

<script>
// import ajax from '@/api/ajax';
// import { reqCategoryListData } from "../../../api"
import { mapActions, mapState } from "vuex"
export default {
    name: "TypeNav",
    data() {
        return {
            flag: false
        }
    },
    computed: {
        ...mapState("home", ["categoryList"])
        
    },
    methods: {
      

        // 事件委派 点击每一项子项跳转到搜索页面  需要携带query参数（？开头&连接）
        // 自定义属性的标识为data
        // 此时需要自定义属性获取每个标签对应的值  原生js获取自定义标签的值的方法为getAttribute，但是只能获取一项 获取多项的方法为dataset


        BtnSearch(e) {
          
            // console.log(e.target.dataset)
            let { level, name, id } = e.target.dataset
            // console.log(level)

            //    将当前路由组件中的query 或者params 结构出来
            let { params } = this.$route
            console.log(params)
            //  点击空白处不可跳转
            if (id) {
                this.$router.push({
                    // path: "/search",
                    name: 'search',
                    // 传递参数 query  category1Id, categoryName
                    query: {
                        ["category" + level + "Id"]: id,
                        categoryName: name
                    },
                    params
                })
            }
        },
        // 判断离开是否隐藏下拉列表
        leaveHidden() {
            if (!this.$route.meta.isHiddenTypeNav) {
                this.flag = false
            }
        }
    },
    mounted() {
        // ajax.get("/api/product/getBaseCategoryList").then(
        //     result => { console.log(result) },
        //     error => { consosle.log(error.message) }
        // )
        // reqCategoryListData().then(
        //     result =>  console.log(result) ,
        //     error =>  consosle.log(error.message)
        // )
        //    this.$store.dispatch("home/getCategoryListData")

        // 判断是否显示下拉三级菜单列表
        // 如果有this.$route.meta.isHiddenTypeNav这个属性 就是home组件 不需要隐藏下拉列表
        if (this.$route.meta.isHiddenTypeNav) {
            this.flag = true
        }
        
    }
}
</script>

<style lang="less" scoped>
.type-nav {
    border-bottom: 2px solid #e1251b;

    .container {
        width: 1200px;
        margin: 0 auto;
        display: flex;
        position: relative;

        .all {
            width: 210px;
            height: 45px;
            background-color: #e1251b;
            line-height: 45px;
            text-align: center;
            color: #fff;
            font-size: 14px;
            font-weight: bold;
        }

        .nav {
            a {
                height: 45px;
                margin: 0 22px;
                line-height: 45px;
                font-size: 16px;
                color: #333;
            }
        }

        .sort {
            position: absolute;
            left: 0;
            top: 45px;
            width: 210px;
            height: 461px;
            position: absolute;
            background: #fafafa;
            z-index: 999;
            border-top: 2px solid #e1251b;

            .all-sort-list2 {
                .item {
                    &:hover {
                        cursor: pointer;
                        background-color: rgb(183, 249, 183);
                    }

                    h3 {
                        line-height: 30px;
                        font-size: 14px;
                        font-weight: 400;
                        overflow: hidden;
                        padding: 0 20px;
                        margin: 0;

                        a {
                            color: #333;
                        }
                    }

                    .item-list {
                        display: none;
                        position: absolute;
                        width: 734px;
                        min-height: 460px;
                        background: #f7f7f7;
                        left: 210px;
                        border: 1px solid #ddd;
                        top: 0;
                        z-index: 9999 !important;

                        .subitem {
                            float: left;
                            width: 650px;
                            padding: 0 4px 0 8px;

                            dl {
                                border-top: 1px solid #eee;
                                padding: 6px 0;
                                overflow: hidden;
                                zoom: 1;

                                &.fore {
                                    border-top: 0;
                                }

                                dt {
                                    float: left;
                                    width: 54px;
                                    line-height: 22px;
                                    text-align: right;
                                    padding: 3px 6px 0 0;
                                    font-weight: 700;
                                }

                                dd {
                                    float: left;
                                    width: 415px;
                                    padding: 3px 0 0;
                                    overflow: hidden;

                                    em {
                                        float: left;
                                        height: 14px;
                                        line-height: 14px;
                                        padding: 0 8px;
                                        margin-top: 5px;
                                        border-left: 1px solid #ccc;
                                    }
                                }
                            }
                        }
                    }

                    &:hover {
                        .item-list {
                            display: block;
                        }
                    }
                }
            }
        }
    }
}
</style>